There are many cryptocurrencies available on the internet because they are decentralized, meaning they are not regulated by a central authority like a bank or government. This allows anyone to create their own cryptocurrency, as long as they have the technical knowledge to do so. Additionally, the underlying technology of most cryptocurrencies, called blockchain, allows for the creation of new and unique cryptocurrencies that can have different features and use cases. This has led to the proliferation of many different cryptocurrencies, each with their own specific set of features and intended use cases.